If you want to see which kids will grow up to be the most successful adults, visit their second-grade classroom, new research suggests.

A study by researchers at the University of Edinburgh in Scotland discovered that math and reading ability at age 7 are linked with socioeconomic status several decades later. The researchers found that such childhood abilities predict socioeconomic status in adulthood over and above associations with intelligence, education and socioeconomic status in childhood.

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The study, which was supported by an Economic and Social Research Council scholarship, was recently published in Psychological Science, a journal of the Association for Psychological Science.